Twenty minutes later, the log changed tone.
The upgrade process is precise. Failing to follow these steps exactly can result in a failed flash or a bricked device. download multicast upgrade tool for huawei lan port routers
| Issue | Likely Cause | Suggested Solution | | :--- | :--- | :--- | | Tool runs but router doesn't flash | The timing for entering upgrade mode was missed, or Firewall blocks port 13456/multicast address 224.0.0.119 . | Manually add an inbound firewall rule allowing all traffic for the specific Ethernet interface. | | Progress stops at 0% | WinRAR missing or faulty; Ethernet connection not stable. | Reinstall WinRAR and ensure you are using a solid Cat5e or better Ethernet cable. | | Router boots, but firmware didn't change | Wrong firmware file for the router model. | Double-check the compatibility of the .bin file with your specific hardware version. | | Device shows "Upgrade Fail" | Antivirus interfered with low-level sector writes. | Temporarily disable real-time scanning before running the tool. | Twenty minutes later, the log changed tone
